Device for separating flue-dust from gas.



PATENTED MAR. 22, 1904.'

W. A.v & J. 'RIDDELLl DEVICE POR SEPARATING FLUE DUST FROM GAS.

APPLIATION FILED JULY 25, 1903.

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No. 755,244. '.PATENTED MAR. 22, 1904.

W. A. & J. RIDDELL. DEVICE FOR SEPARATING FLUE DUST FROMGAS.

APPLICATION FILED JULY 25. 1903.

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PATENTED MAR. 22. 1904.l

l. W. A. 6v J. RIDDELL. DEVICE FOR SBPARATING FLUE DUST FROM GAS.

APPLICATION FILED JULY 2'5, 1908. l

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PATEN-IED MAR. 22, 1904.

y W. A..f& J. RIDDELL.- DEVICE FOR SBPARTING- FLUB DUST FROM GAS.

' APPLICATION TILED JULY 25, 1903.

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Z/ y@ 441.64%? Y l UNiTED STATES PATENT Patented March 22, 1904.

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WILLIAM A. `RIDDELL AND JOSEPH RIDDEIJL, OF SHARON, PENN- SYLVANIA.

DEVICE FOR SEPARATING FLUE-DUST FROM GAS'.

SPECIFICATION formingpart of Letters Patent No. 755,244, dated March 22,1904. Application ledduly 25, 1903. Serial No. 167,051. (No model.)

To all whom t may concern: A

Be it known that we, WILLIAM A. RIDDELL and JOSEPH RIDDELL, citizens ofthe United States, residing at Sharon, Mercer county, Pennsylvania, haveinvented certain new and useful Improvements in Devices-for Separat' ingFlue-Dust from Gas, of whichthe following is a specification.

My invention relates to improvements in devices for extracting the smallparticles of ore, commonly known as liuc-dust, which are blown out of ablast-furnaceby the blast from the blowing-engine and carried with thegas through the down-comer into .the flues and then into the stoves andboilers where they accumulate to the great injury of these parts,causing detrimental working of these parts; and the object of theinvention is to provide a simple and effective construction which willeffectually separate the iiue-dust without in anyway interfering withthe blast.

The invention includes the construction and arrangement of partshereinafter described, and particularly pointed out in the claims.

We have illustrated the invention in the accompanying drawings, inWhich- Figure 1 is a plan view; Fig. 2, a side elevation; and Fig. 3 anend view, partly in section. Fig. 4 is a sectional view, and Fig. 5 aside elevation, of a modified form.

Referring more particularly to the figures, the numeral 4 describes thepipe which communicates with the down-comer, and the numeral 5 anelongated tank from which a gasoutlet pipe 7 leads away the purified gasto the hot-blast pipes. As the down-comer and the blast-pipe form nopart of the present in: vention and are"well known to those skilled inthe art, illustration thereof is deemed unnecessary, the presentinvention relating solely to the separator.V

The tank 5 just referred to is preferably made rectangular, as shown,and isprovided with a substantially V-shaped bottom portion 5, providedat the apex with a plurality of valved openings 5b, through which .theseparated particles of ore or iiue-dust may be removed from time totime. The tank is provided with a water-inlet pipe 8 anda wateroveriiowpipe 9, by which the water-level in the tank is maintained in closeproximity to the under side of the pipe 4. The pipe 4 is preferablyformed where it enters the tank in looped shape and is provided on itsunder s ide with a narrow slot 4, which extends along both branches ofthe loop and around the curved end. The slot is of such width and lengthas to correspond to the capacity the blast of gas passing through thepipe 4 will be directed downward in a thin stream directly against thesurface of the water within the tank. The result of this is that all ofthe gas will impinge directly against the surface of the water and everyparticle of flue-dust be brought' in contact with the water and beprecipitated thereby to the bottom of the tank, while at the same time aminimum amount of resistance is caused to the passage of the gas. Thebottom of the tank is preferably provided with inclined walls eX-tending transversely of the tank, as indicated at 10, which causes allthe precipitated particles to settle directly above the outlet-valves5b, and a channel ll, provided beneath the outlet-valves and having aninclined bottom, receives the waste water from the pipe 9, which washesaway the sediment discharging through the valves 5b. We prefer tosupport the tank in the manner' illustrated in the drawings by concretepillars a and triangular iron brackets b, as shown. We may also providea mah'ole for access to the tank, as indicated at Instead of having asingle large pipe we may use a plurality of smaller pipes arranged in ahorizontal plane, as shown in Figs. 4 and 5. In this form the pipe 4communicates with a compartment or .chamber 11 in the end of the tank 5,from which compartment a plurality of horizontally-disposed pipes leadforward into proximity to the opposite end of the tank. These have eacha narrow slot extending the entire llength of the under side similar to,but smaller, 0f course, than the slot in the large pipe shown in, thefirst form described. If

of the pipe 4, and it will thus be seen that desired, the ends of thesepipes instead of being closed may be turned downwardly, so as to besubmerged in the water.

Having thus described our invention, what we claim is* l. A device forseparating flue-dust from the gas coming from a blast-furnace,comprising a closed tank having a water-inlet and a water-outlet wherebywater is maintained in said tank at a determined level, a pipe extendinghorizontally in said tank slightly above said water-outlet, said pipebeing stationary and having an opening in its lower side only directedagainst the surface of the water, a gas-inlet to the pipe and agas-outlet from the tank, substantially as described.

2. In combination, a tank containing water, a pipe extendinghorizontally at a slight distance above the level of the water in saidtank and having an elongated opening or slot extending longitudinally inits under side, a gasinlet to the pipe and a gas-outlet from the tank,the gas issuing from the elongated opening having to cross a free spaceto reach the surface ofthe water, substantially as described.

3. In combination, a tank having a contracted lower portion, awater-inlet and a wateroutlet from said tank arranged to maintain watertherein ata predetermined level, a horizontallydisposed gas-supply pipelocated in said tank with a gas-exit in its lower side, a gas-outletfrom said tank above the waterlevel, means at the bottom of said tankfor delivering the sediment from the tank, and a trough into which thesediment is delivered, the overow-pipe from the tank emptying into saidtrough, substantially as described.

In testimony whereof We aiix our signatures in presence of twowitnesses.

WILLIAM A. RIDDELL. JOSEPH RIDDELL. Witnesses:

A. W. WILLIAMS, K. H. BUNDEL,

